/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Parameterization/MeshUVTransforms.h
For all UV seam elements, apply a small displacement so that they have unique positions. This allows unwelding/re-welding the UVs without breaking the seams (which is horrible but necessary in some cases)
namespace UE { namespace MeshUVTransforms { void UE::MeshUVTransforms::MakeSeamsDisjoint ( [FDynamicMeshUVOverlay](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshUVOverlay) * UVOverlay ) } }